Abstract
This paper discusses the critical decision process of extracting or selecting the features in a supervised learning context. It is often confusing to find a suitable method to reduce dimensionality. There are pros and cons to deciding between a feature selection and feature extraction according to the data’s nature and the user’s preferences. Indeed, the user may want to emphasize the results toward integrity or interpretability and a specific data resolution. This paper proposes a new method to choose the best dimensionality reduction method in a supervised learning context. It also helps to drop or reconstruct the features until a target resolution is reached. This target resolution can be user defined, or it can be automatically defined by the method. The method applies a regression or a classification, evaluates the results, and gives a diagnosis about the best dimensionality reduction process in this specific supervised learning context. The main algorithms used are the random forest algorithms, the principal component analysis algorithm, and the multilayer perceptron neural network algorithm. Six use cases are presented, and every one is based on some well-known technique to generate synthetic data. This research also discusses each choice that can be made in the process, aiming to clarify the issues about the entire decision process of selecting or extracting the features.
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We used only datasets that a publicly available.
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Acknowledgements
This work has been supported by the “Cellule d’expertise en robotique et intelligence artificielle” of the Cégep de Trois-Rivières and the Natural Sciences and Engineering Research Council.
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This work has been supported by the Natural Sciences and Engineering Research Council.
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JSD: Conceptualization, Methodology, Software, Writing—Original Draft, Software. DM: Conceptualization, Methodology, Validation, Resources, Writing—Review and Editing, Supervision, Project administration, Funding acquisition.
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Dessureault, JS., Massicotte, D. DPDR: A Novel Machine Learning Method for the Decision Process for Dimensionality Reduction. SN COMPUT. SCI. 5, 124 (2024). https://doi.org/10.1007/s42979-023-02394-9
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DOI: https://doi.org/10.1007/s42979-023-02394-9